More on My Little Pony Girls Rainbow Dash Costume Deluxe: Make all of her dreams come true with a Rainbow Dash Costume Deluxe for girls. The My Little Pony dress and matching blue tights are a magical costume foundation. Accessorize her look with all of the essentials — Rainbow Dash wings, a tail, slipper shoes, and of course a Rainbow Dash headband. The matching rainbow-striped arm warmers and leg warmers keep her nice and toasty while out trick-or-treating. She's ready for adventures in Ponyville in this Rainbow Dash Costume Deluxe.